Question

From the figure, what’s the relation between T1, T2, and T3?

(a) T1 > T2 > T3

(b) T3 > T2 > T2

(c) T3 > T1 > T2

(d) T2 > T1 > T3

This question was posed to me at a job interview.

This key question is from Black Body Radiation in division Quantum Physics of Engineering Physics I

Answer 1

The correct option is (b) T3 > T2 > T2

To elaborate: We already know, as the temperature of the body is higher, the intensity of the black body radiations would be higher. Thus, from the graph, the radiations with temperature T3 has the highest intensity followed by the one with temperature T2 and then T1. Thus, T3> T2 > T1.